Blank "Volume" notification displayed at startup and when scrolling the indicator.

As of the latest indicator-sound package in Utopic, there is a blank "Volume" notification that is displayed:
1) at system startup.
2) when scrolling the indicator (along with the normal volume indicator).

Please see the attached screenshot.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: indicator-sound 12.10.2+14.10.20141007-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-21.28-generic 3.16.4
Uname: Linux 3.16.0-21-generic x86_64
ActionStates: ({'mute': (true, signature '', [<false>]), 'phone-settings': (true, '', []), 'next.gmusicbrowser.desktop': (true, '', []), 'mic-volume': (true, '', [<1.0>]), 'scroll': (true, 'i', []), 'play-playlist.gmusicbrowser.desktop': (true, 's', []), 'gmusicbrowser.desktop': (true, '', [<{'running': <false>, 'state': <'Paused'>}>]), 'desktop-settings': (true, '', []), 'volume': (true, 'i', [<0.67987060546875>]), 'root': (true, '', [<{'title': <'Sound'>, 'accessible-desc': <'Volume (67%)'>, 'icon': <('themed', <['audio-volume-medium-panel', 'audio-volume-medium', 'audio-volume', 'audio']>)>, 'visible': <true>}>]), 'previous.gmusicbrowser.desktop': (true, '', []), 'play.gmusicbrowser.desktop': (true, '', [<'Paused'>])},)
ApportVersion: 2.14.7-0ubuntu5
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Oct 9 06:57:23 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-08-09 (60 days ago)
InstallationMedia: Xubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140809)
SourcePackage: indicator-sound
UpgradeStatus: No upgrade log present (probably fresh install)